Plasmonic Split-Trench Resonator for Trapping and Sensing

Yoo D. ; Barik A. ; León-Pérez F. ; Mohr D.A. ; Pelton M. ; Martín-Moreno L. ; Oh S.-H.

Resumen: On-chip integration of plasmonics and electronics can benefit a broad range of applications in biosensing, signal processing, and optoelectronics. A key requirement is a chip-scale manufacturing method. Here, we demonstrate a split-trench resonator platform that combines a high-quality-factor resonant plasmonic biosensor with radio frequency (RF) nanogap tweezers. The split-trench resonator can simultaneously serve as a dielectrophoretic trap and a nanoplasmonic sensor. Trapping is accomplished by applying an RF electrical bias across a 10 nm gap, thereby either attracting or repelling analytes. Trapped analytes are detected in a label-free manner using refractive-index sensing, enabled by interference between surface-plasmon standing waves in the trench and light transmitted through the gap. This active sample concentration mechanism enables detection of nanoparticles and proteins at a concentration as low as 10 pM. We can manufacture centimeter-long split-trench cavity resonators with high throughput via photolithography and atomic layer deposition, toward practical applications in biosensing, spectroscopy, and optoelectronics. © 2021 American Chemical Society.

Idioma: Inglés

DOI: 10.1021/acsnano.0c10014

Año: 2021

Publicado en: ACS NANO 15, 4 (2021), 6669-6677
ISSN: 1936-0851

Factor impacto JCR: 18.027 (2021)

Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 13 / 180 = 0.072 (2021) - Q1 - T1
Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 20 / 345 = 0.058 (2021) - Q1 - T1
Categ. JCR: CHEMISTRY, PHYSICAL rank: 12 / 165 = 0.073 (2021) - Q1 - T1
Categ. JCR: NANOSCIENCE & NANOTECHNOLOGY rank: 11 / 109 = 0.101 (2021) - Q1 - T1

Factor impacto CITESCORE: 24.3 - Engineering (Q1) - Physics and Astronomy (Q1) - Materials Science (Q1)

Factor impacto SCIMAGO: 4.611 - Engineering (miscellaneous) (Q1) - Physics and Astronomy (miscellaneous) (Q1) - Materials Science (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2017-88358-C3-1-R
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2017-88358-C3-2-R

Tipo y forma: Artículo (PostPrint)